feature: upgrade nginx core to 1.25.1 which supports HTTP3.

patches/ngx_http_redis-0.3.9-remove_content_encoding.patch

@@ -0,0 +1,14 @@
+diff --git a/ngx_http_redis_module.c b/ngx_http_redis_module.c
+index 23c8084..404acb2 100644
+--- a/ngx_http_redis_module.c
++++ b/ngx_http_redis_module.c
+@@ -614,9 +614,6 @@ found:
+             ngx_str_set(&h->key, "Content-Encoding");
+             ngx_str_set(&h->value, "gzip");
+             h->lowcase_key = (u_char*) "content-encoding";
+-#if (NGX_HTTP_GZIP)
+-            u->headers_in.content_encoding = h;
+-#endif
+         }
+
+         /* try to find end of string */